Application of Acoustic Full Waveform Inversion to a Low-frequency Large-offset Land Data Set
Application of Acoustic Full Waveform Inversion to a Low-frequency Large-offset Land Data Set
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DOI：
10.1190/1.3513930
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
R. Plessix;G. Baeten;J. W. Maag;M. Klaassen;Zhang Rujie;Tao Zhifei
中科院分区：
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作者：
R. Plessix;G. Baeten;J. W. Maag;M. Klaassen;Zhang Rujie;Tao Zhifei
通过解释全波场，全波形反演有可能成为解释复杂地质条件下采集的地震数据的关键工具。然而，它的应用需要低频率和大偏移，以避免在局部最小值结束。这种方法已经用海洋数据集和声波全波形反演来说明。当正确规划采集和预处理时，声波全波形反演也可以应用于陆地数据集。为了证明这种专用方法的相关性，我们将低频采集的陆地数据集反转到1.5 Hz和20 km偏移。我们发现，全波形反演恢复的速度取代了一个来自手工挑选的nmo-道集速度分析，即使当我们开始与原油的1D模型。通过低频、长炮检距的采集和专门的预处理，可以获得该地区高分辨率的地震偏移图像。
By interpreting the full wavefield, full waveform inversion has the potential to become a key tool to interpret seismic data acquired in complex geological settings. However, its application requires low frequencies and large offsets to avoid ending up in a local minimum. This approach has been illustrated with marine data sets and acoustic full waveform inversion. Acoustic full waveform inversion can also be applied with land data sets when the acquisition and the pre-processing are planned correctly. To demonstrate the relevance of this dedicated approach, we invert a land data set acquired with low frequencies down to 1.5 Hz and 20 km offset. We show that the velocity retrieved by full waveform inversion supersedes the one derived by handpicked nmo-gather velocity analysis even when we start with a crude 1D model. With the acquisition of low frequencies and long offsets and a dedicated preprocessing, a high-resolution seismic migrated image could be obtained over this land area.